1 // SPDX-License-Identifier: GPL-2.0
3  * SPI access driver for the following TI PMICs:
4  *  - LP8764
5  *  - TPS65224
6  *  - TPS652G1
7  *  - TPS6593
8  *  - TPS6594
10  * Copyright (C) 2023 BayLibre Incorporated - https://www.baylibre.com/
18 #include <linux/spi/spi.h>
27 MODULE_PARM_DESC(enable_crc, "Enable CRC feature for SPI interface");
33 	struct spi_device *spi = context;  in tps6594_spi_reg_read()  local
34 	struct tps6594 *tps = spi_get_drvdata(spi);  in tps6594_spi_reg_read()
42 	if (tps->use_crc)  in tps6594_spi_reg_read()
45 	ret = spi_write_then_read(spi, buf, 2, buf + 2, count_rx);  in tps6594_spi_reg_read()
49 	if (tps->use_crc && buf[3] != crc8(tps6594_spi_crc_table, buf, 3, CRC8_INIT_VALUE))  in tps6594_spi_reg_read()
50 		return -EIO;  in tps6594_spi_reg_read()
59 	struct spi_device *spi = context;  in tps6594_spi_reg_write()  local
60 	struct tps6594 *tps = spi_get_drvdata(spi);  in tps6594_spi_reg_write()
68 	if (tps->use_crc)  in tps6594_spi_reg_write()
71 	return spi_write(spi, buf, count);  in tps6594_spi_reg_write()
86 	{ .compatible = "ti,tps6594-q1", .data = (void *)TPS6594, },
87 	{ .compatible = "ti,tps6593-q1", .data = (void *)TPS6593, },
88 	{ .compatible = "ti,lp8764-q1",  .data = (void *)LP8764,  },
89 	{ .compatible = "ti,tps65224-q1", .data = (void *)TPS65224, },
95 static int tps6594_spi_probe(struct spi_device *spi)  in tps6594_spi_probe()  argument
97 	struct device *dev = &spi->dev;  in tps6594_spi_probe()
103 		return -ENOMEM;  in tps6594_spi_probe()
105 	spi_set_drvdata(spi, tps);  in tps6594_spi_probe()
107 	tps->dev = dev;  in tps6594_spi_probe()
108 	tps->reg = spi_get_chipselect(spi, 0);  in tps6594_spi_probe()
109 	tps->irq = spi->irq;  in tps6594_spi_probe()
113 		return dev_err_probe(dev, -EINVAL, "Failed to find matching chip ID\n");  in tps6594_spi_probe()
114 	tps->chip_id = (unsigned long)match->data;  in tps6594_spi_probe()
116 	if (tps->chip_id == TPS65224 || tps->chip_id == TPS652G1)  in tps6594_spi_probe()
119 	tps->regmap = devm_regmap_init(dev, NULL, spi, &tps6594_spi_regmap_config);  in tps6594_spi_probe()
120 	if (IS_ERR(tps->regmap))  in tps6594_spi_probe()
121 		return dev_err_probe(dev, PTR_ERR(tps->regmap), "Failed to init regmap\n");  in tps6594_spi_probe()
138 MODULE_DESCRIPTION("SPI Interface Driver for TPS65224, TPS6594/3, and LP8764");